I am using QGIS 3.2.3. I am trying to do some simple actions. Selecting by attribute and exporting to shapefiles. I am using a OSM file as a source which is barely 60MB. But for some reason the process is incredibly slow (as in, it runs for twenty minutes and only reaches 5% of the export). When I look at my task manager QGIS is only using between 5-10% I suspect this is not much, but I don't know how to increase it (or even if I should.) Should I make it use more CPU? Or should I find another way to speed it up?

  • Could you have a try with QGIS 2.18? QGIS 3 seems to be very slow in some opetation, see gis.stackexchange.com/questions/300499/…. – user30184 Nov 4 '18 at 13:53
  • Try with QGIS 3.4.1 - there's been a number of fixes to .osm file handling. It's normal that you'll only see small overall CPU usage here, as a safe operation like this is always going to be limited to a single thread and cannot be made multithreaded. – ndawson Nov 4 '18 at 19:47
  • Please Edit the question to specify the number of CPUs on the system and the type and excess speed of the disk where the data resides. – Vince Nov 4 '18 at 21:25
  • He guys thanks for the help. I moved on to versio 3.4.1 and it worked fine. Thanks for helping me out! – IJsbrand Nov 6 '18 at 20:25

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